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pychu [463]
2 years ago
5

Write the balanced equation fr this chemical reaction _Mg + _O2 -> _MgO​

Chemistry
1 answer:
Rudiy272 years ago
6 0

Answer:

_2Mg + _O2 --≥2MgO this is balanced

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A gas occupies a volume of 180 mL at 35oC and 740 mmHg. What is the volume of the gas at STP?
Tasya [4]

Answer:

there you go

Explanation:

6 0
3 years ago
When chromium loses two electrons, its configuration changes to
damaskus [11]

Electronic configuration of cromium is  

Cr-[Ar]4s¹3d⁵  

When cromium loses two electrons it becomes Cr⁺².  

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Cr⁺²-[Ar]3d⁴  

One electron will go from 4s orbital and one electron will go from 3d orbital.

So the answer here is D. [Ar]3d⁴ -because after losing 2 electrons electronic configuration of cromium becomes  [Ar] 3d⁴.


3 0
3 years ago
How many liters of carbon dioxide gas are there in 4 moles of CO2 at STP?
Ad libitum [116K]

Answer:

<u>89.6 L</u>

Explanation:

In normal conditions,

<u><em>For every </em></u><u><em>1 mole</em></u><u><em> of carbon dioxide at STP, it occupies </em></u><u><em>22.4 L</em></u><u><em> of volume.</em></u>

<u><em /></u>

============================================================

Solving :

⇒ 1 mole : 22.4 L

⇒ 1 × 4 : 22.4 × 4

⇒ 4 moles : <u>89.6 L</u>

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The minimum energy required to start a reaction
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The answer to that question would be Activation energy. If would like me to elaborate just let me know. :)

7 0
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